Heater



n. B. MACM'ILLAN.

HEATER APPLICMION FILED IAN. 24 .1921. 1,437;812.

El I3. IV

Patented ne.5,1922.

ZSHEETS-SHEET l.

2, 13 ""Illllli, l

e@ 25 s- HEMI inverni/11" wmldHaaHil/wn D. B. NlAcMILLAN.

HEATER.

APPLICATION FILED IAN.24 IIQZI.

Patented Dec. 5, 1922.

2 SHEETS-8Min 2.

lwenor ondidlacMl/an di 'nel Patented Dec. 5, 1922.

rarer l HEATER..

Application led'plfanuarye, 1921. Serial No. 439,438.

To illecito/nutmeg concern: f

Be it known that l, DONALD i3. Maollgilinnin, a citizen of the United States? residing at Freeport, county of Cumberland, State of Maine, have invented certain new and useful improvements in Heaters, of which the following is a specification.

This invention relates to heating apparatus and more particularly to a heating device for converting ice or snow into hot water.

lin field work in northern regions or at high altitudes or in'seasons of eXtreme cold the only available source of supply of pure water is ice or snow and in many instances it is of paramount importance tol obtain quickly hot or boilingwater without'delay from such congealed sources.

The problem of obtaining hot or boiling water from such a source by apparatus capable of transportation as field equipment is further rendered difficult by the almost imperative necessity that the change from the congealed form to the hot liquid form be accomplished in a very short time. rl-Chis requirement is based onthe stern necessity of conservation of time and of emergency use under conditions which do not permit eX- hausted `and famished men to waitfor any slow process of melting and subsequent boiling for the purposes of the preparation of food or drink. v 1

ln arctic work, particularly in more recent years, various devicesy have been tried with greater or less'degree of success. Such devices have been for the most part rather crude and experimental. While they have operated with sufficient success to demonstrate `the principle7 they have not been made mechanically adequate or of proper convenience or eciency.

The general principle involved was originally conceivedby the late AdmiralRE. Peary and no claim is herein made yast-o the originality of said general principle. This principle above acknowledged was briefly that the action of heat whether from hot fumes or flames might be applied direct to a mass of ice fragments or chunks of snow around a centrally disposed kettle or pot which should catch the drip of the melting icel and be itself heated so as to boil the water as it accumulated in the pot.

As' illustrative of my invention I have shown inthe accompanying drawing an embodiment which in part has been found of proven utility in the field and in part an improvementand refinement developed in lield experience. l shall discuss this embodiment therefore both as illustrative of the features of my invention andas in itself constituting a form well adapted to practical use. Throughout the specification and drawings like reference characters are em ployed to indicate corresponding parts, and in the drawings:

Fig, l is anexternal view of a stove in accordance with my invention and with the parts separated.

Fig. Han external view of the stove yassembled.

Fig. IH a viewl of the stove packed for shipment.

Fig. IV assembled. y

Fig. V a sectional view of the stove packed,

Fig. section as seen from the indicated line of visionVI--VI7 Fig. I, and

Fig. VIlis a fragmentary section on the 'line VII-VH of Fig. V looking down. n

`My stove consists primarily of an upper or ice chamber section 1 and a lower or hot water section 2, eachfof said sections being preferably.cylindrical. '.lhe' upper` section 1 preferablyi has an outside bearing on the top of section 2 when in use and slips over arid encloses the section 2 when inverted thereon, so as to pack snugly and conveniently and forma suitable containerjfor. suchy mess kits or provisions as maybe desired is a sectional view of the stove to be packed` therein.

"The section 1 consists .of ka `simple cylin drical shell or body having near itslower end a bottom 10 formed as an inverted cone1 the apex kof which extends substantiallyto but .not beyond the lower end'of the external shell. Thishottom is perforated as at 101 and constitutesa support for a mass of ice fragmentsl or the like, theapex or point constituting a rcentral drip to which` the water tends to trickle as the ice melts.`

The upper portion 1 hesja suitable cover `13 having an internal flange 131 and a handle yor strap loop 1 32'and the sides of the body lare provided with strap k uides 11.

The bottom portion consists a so of a tu- Vl is a bottoni view of the' container bular shell 2 in which is supported a kettle or water container 2l. This container is perforated around its margin with openings 22 through which fumes from 'an annular lamp 23 may pass upwardly into the ice chamber.

The bottom of the kettle 2l is slightly` concaved as at 212 t'orming a slight air pocket in which heat tends to accumulate and centralize betore passing to the openings 22,v

so that the heat after passi-ng'the'margin ot the pocket 2l2 is distributed about the surface ot the pan 2l and lead with more kor less directness to the openings 22.

vThe burner is preferably7 a simple annular trough ot uitable diameter to give proper distribution of heat over the bottom of the pan '21 and ot sutlicientcapacity to hold a predetermined amount ot alcohol or other liquid fuel suthcient to melt ice to lill the kettle 2l. The 'fuel is preferably alcohol. The burner 23 may be mounted in an7 convenient manner but is coiivenientb7 attached to the inner tace oit the lower 'cover 24. The cover has an internal flange 241 pierced for dra'tt at 28. Thiscover is preferably insulated as at so that where the stove is set on the snow or ice it willnot melt awaj7 its own support. The covers` 13 and 24 are both provided with bayonet lock connections 2G with their respective shells so thatiwhen packed the stove is held together and may be used as a container.

In operation when the stove is set up as shown in Figs. ll and IV, the upper reservoir is filled with chunks or fragments o'l5 ice or it' snow is used it should'be compressed into chunks or balls to permit dratt through the ice chamber. lith the lamp 23 lighted, water almost immediatelv begins to drip from the apex oit the conical bottom l() into the kettle 2l and almost immediatel;rv the accumulating water begins to boil. ...as the play of the heat is directhY on the kettle 2i it is'maintained hot and the water isr heated .as it accumulates'. ln practice in about nine minutes a. lgallon ot boiling water may be produced from ice at 300 F. so that by tho time the ice is completelv melted the pan`2l is lilled with boiling water.y

At this point the upper portion l is litt/ed from the lower portion and the contents ot the Vpa'ni`21`inay be dipped out with cups or it desired may be poured into other receptacles'. 'For the purposes of pouring l omit the draftzholes 22 for a short space on the margin of the lkettle 2l as at 211, Figs. IV and V A c l/Vhen it is desired to pack the stove the cover 13 of thetop 1 is removedand the top 1 inverted and slid down over the base 2 and the cover 13 applied to the opposite end ot thesec'tion 1. The end closure-24 provided foi-fthe bottom of the portion l is provided with a iat or equipment packed strap opening 241:2 so that when the upper portion is inverted and the stove shoved together in telescope position, strap or thong: may be passed about it. holding the parte together and also providing` a tight container in which toed or supplies maj: he contained.` The ripper section l is setlicient length to close the openings when the stove is packed tor sl ipmeiit. This prevents the loss oi" anv small articles ot toed within rl stove.

The stove ma;v be conveniently built of light thin sheet iron or other metal so that it is strong and durable and ve sufticientlj: light to avoid being a burden even under the most adverse conditions.

Various modifications may made in the construction oft parts ot my apparatus anc. in t oanner of assemblj,T and det( ils of design, rall without departing "from the spirit et my inve?- tion it within the limits ot the apiiended claims.

lfhat l therefore claim cure by Letters Patent is:

lT A heater comprising a lieatervsection and a reversible container section telescopically mounted thereon, an open-top kettle mounted within said heater section, there being a space between the walls of the kettle and the heater section to permit the circulation ot heated air about the'kettle, said container section having a perrorated bottom extending into the open top ot said kettle when the heater is set up .tor use and constituting a cover for said kettle when the container section is reversed'upon said heater section for purposes of transportation, and a heater disposable beneath said kettle,

2. A heater comprising a yheater section and a reversible container section telescopically mounted thereon, 'an open-top kettle mounted wit-hin saidheater section and having hea-t admission openings through the upper part of its wall, there being a space between the walls of the kettle and the heater section to permit the circulation of heated air vabout and into the kettle through said heat admission openings, said container section having a perforated downwardly disposed bottom extending into the open top ol said kettle when the heater is set up for use and constituting a cover for said kettle when the container section is reversed upon said'heater section Vfor purposes of transportation, and a heater disposable vbeneath said kettle.

3. A heater comprising a. heater section and a reversible container section telescopically mounted thereon, an open-top kettle disposed within and connected at its upper edge to said` heater `sectionand having heat admission openings through the upper part of vits wall, there being ay space between the Walls of the kettle andthe heater'section to and desire to lio permit the circulation of heatedair about and into the kettle through the heatad mission openings, said container section having a perforated inverted conic bottom eX- tending into the open top of said kettle when the heater is set up for use and constituting a cover for said kettle when the con tainer section is reversed upon said heater section for purposes of transportation, and a heater disposable beneath said kettle.

4f. A heater comprising a heater section7 an open-top kettle disposed within and connected at its upper edge to said heater section and having heat admission openings through the upper part of its wall, there being a space between the kettle and the heater to permit the circulation of heated air about and into the kettle through said heat admission openings, and a heater disposable beneath and a container section disposable above said kettle.

5. A heater comprising a heater section having a draft opening, an open-top kettle mounted within said heater section, a container section telescopically mounted upon said heater section and having a perforated bottom extending into the open top of said kettle when the heater is set up for use and constituting a cover for said kettle when the container section is reversed upon said heater section for purposes of transporta-y tion andk said container section when reversed itself closing said draft opening of the heater section, and a heater disposable beneath said kettle.

6. A heater comprising an open-bottom heater section having a draft opening adjacent its bottom, an open-top kettle mounted within said heater section, there being a space between the walls of the kettle and the heater section to permit the circulation of heated air about the kettle, an open-top container section telescopically mounted uponv said heater section and having a perforated downwardly disposed bottom eX- tending into the open top of said kettle when the heater is set up for use and constituting a cover for said kettle when the container section is reversed upon said heater section for purposes of transportation and said container section when reversed itself closing` said draft opening of the heater section, removable closures for said heater and container sections, and a heater disposable beneath said kettle and supported upon the bottom closure for the heater section.

7. A heater comprising an open-bottom heater sect-ion, a closure therefor having a draft opening, an open-top kettle mounted within said heater section and having heat admission openings through the upper part of its wall, there being a space between the walls of the kettle and the heater section to permit the circulation of heated air about and into the kettle through said heat admission openings, an open-top container y section telescopically mounted upon said heater section and havinga perforated inverted conic bottoni extending into open top of said Lkettle when the heater is up for use and constituting` a cover for said kettle when the container section isreversed upon said heater section for purposes of transportation and said container section when reversed itself closing said draft opening in the bottom closure for the heater tion, a heater disposable beneath said kettle,v and a removable closure for the ogen top of said container section.

8. A heater comprising an openbottoin heater section, a removable closure for the bottom of said section and having a draf opening, an open-top kettle connected at its upper edge to said section and extending downwardly thereinto, there being a space between the walls of the kettle and heater section to permit the circulation of heated air about the kettle, and having adjacent its top edge a plurality of heat admission passages and a heat centralizing pocket in its bottom wall, a'heater mounted upon said closure immediately below said heat centralizing pocket, an open top container section telescopically mounted upon said heater section and having a downwardly disposed bottom extending into the open top of said kettle when the heater is set up for use and constituting a cover for said kettle when said container section is reversed upon said heater section for purposes of transporta-k tion and said container section when reversed itself closing said draft opening at the bottom of the heater section, and a removable closure for the open top of said container section.

9. A heater comprising an open-bottom heater section, a removable closure for the bottom of said section and having a draft opening, an open-top kettle extending downwardly into said section and having a heatcentralizing pocket in its bottom wall, a heater mounted upon said closure immediately below said heat-centralizing pocket, an open top container section telescopically mounted upon said heater section and having a perforated inverted conic bottom eX- y tending into the open top of said kettle when the heater is set up for use, and constituting a. cover for said kettle when said container section is reversed upon said heater section for purposes of transportation and said container of a length to'close said draft opening at the bottom of the heater section when reversed upon said heater section, and a removable closure for the open top of said container section.

10. A heater comprising a heater section bent upon itself at its upper edge to provide an open-top kettle extending downwardly into said section in spaced relation thereto,

Seid kettle having adjacent its top edge u, In testimony Whereof affix my Signaplurality of heat admission passages emol` ture in presence of two Witnesses. having a heat-eentralizing pocket in .its bot- DONALD BAXTER MACMLLAN. tom Wall, e hemel" mounted Withln said l heater section immediately below said heat- Witnesses:

centralizing pocket, and a container section MARION F WEISS,

disposable above said kettle. Griso,` B. RAWLINGS. 

